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United States Patent | 5,783,807 |
Uehashi ,   et al. | July 21, 1998 |
After the initial temperature T0 of a heating chamber is sensed (S34), heating by microwaves is conducted until the sensor output of a humidity sensor exhibits a prescribed humidity change amount of 1.0 V (S35-S39). Then, an additional time period is operated based on initial temperature T0 and a time period passed for the elevation of 1.0 V (S40-S42, S50). Heating by microwaves is conducted for the additional time period (S43, S51), and then heating by a heater is conducted. As a result, the moisture included in the food is evaporated and finished crisp. In other words frozen precooked food may be thawed and cooked into a tasty state.
Inventors: | Uehashi; Hiroyuki (Koka-gun, JP); Tanaka; Kazuko (Yasu-gun, JP) |
Assignee: | Sanyo Electric Co., Ltd. (Moriguchi, JP) |
Appl. No.: | 793925 |
Filed: | March 20, 1997 |
PCT Filed: | July 25, 1996 |
PCT NO: | PCT/JP96/02087 |
371 Date: | March 20, 1997 |
102(e) Date: | March 20, 1997 |
PCT PUB.NO.: | WO97/05429 |
PCT PUB. Date: | February 13, 1997 |
Jul 25, 1995[JP] | 7-189089 |
Current U.S. Class: | 219/685; 99/325; 219/703; 219/705; 219/707; 219/710; 219/719 |
Intern'l Class: | H05B 006/68 |
Field of Search: | 219/704,703,705,707,710,711,719,685,757,681 99/325,DIG. 14 |
4481394 | Nov., 1984 | Tanabe | 219/685. |
4874928 | Oct., 1989 | Kasai | 219/705. |
5155339 | Oct., 1992 | An | 219/707. |
5367145 | Nov., 1994 | Takagi | 219/710. |
5464967 | Nov., 1995 | Gong | 219/707. |
Foreign Patent Documents | |||
58-13934 | Jan., 1983 | JP. | |
61-69708 | May., 1986 | JP. | |
63-172830 | Jul., 1988 | JP. | |
64-19230 | Jan., 1989 | JP. | |
4-225727 | Aug., 1992 | JP. | |
5-205867 | Aug., 1993 | JP. |